diff --git a/Gemfile b/Gemfile
index 9be32d3bf1ee994b4f0c1cd0ed833f92cad8632e..8867700df405d6345e9be2ef58f5abdec5535720 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-gem "pg_query"
+gem "pg_query", ">= 1.0", "< 2"
 
 group :development do
   gem "rspec"
diff --git a/Gemfile.lock b/Gemfile.lock
index 6fbae0b9f02b564f983931972f474a0636bcbd07..db082ed6633020f36469ddfe8573bce603f974b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -21,8 +21,8 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  pg_query
+  pg_query (>= 1.0, < 2)
   rspec
 
 BUNDLED WITH
-   1.14.6
+   1.17.1